Fire Hydrants are required to be tested Annually to ensure proper functioning. Each hydrant is to be opened fully and water flowed until all foreign material has cleared. Flow is required to be maintained for not less than one minute. Flow Tests are usually required every three years, depending on the local AHJ (Authority Having Jurisdiction). A flow test is conducted to determine pressure and flow-producing capabilities at any location within the distribution system. The primary function of fire flow tests is to determine how much water is available for fighting fire.
